Changing a Child's Name: Does an Unmarried Mother Need the Father's Permission to Give a Child Her Surname

My question involves paternity law for the State of: Kansas. My daughter had her child in Kansas and the father was at the birth. He left 45 min. after the birth and went back to his home in a different state and has not returned or had any contact with her son. My daughter did give her son his last name. However, the father is not listed on the B/C. My daughter now wants to give her son her last name, not another man's, Does she need his consent in the state of Kansas? Thank you for any assistance anyone can give us!

Changing a Child's Name: Does an Unmarried Mother Need the Father's Permission to Give a Child Her Surname